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| Mirrors > Home > MPE Home > Th. List > plusgndxnn | Structured version Visualization version GIF version | ||
| Description: The index of the slot for the group operation in an extensible structure is a positive integer. (Contributed by AV, 17-Oct-2024.) |
| Ref | Expression |
|---|---|
| plusgndxnn | ⊢ (+g‘ndx) ∈ ℕ |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | plusgndx 17500 | . 2 ⊢ (+g‘ndx) = 2 | |
| 2 | 2nn 12456 | . 2 ⊢ 2 ∈ ℕ | |
| 3 | 1, 2 | eqeltri 2860 | 1 ⊢ (+g‘ndx) ∈ ℕ |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ∈ wcel 2147 ‘cfv 6566 ℕcn 12375 2c2 12437 ndxcnx 17415 +gcplusg 17472 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-10 2180 ax-11 2197 ax-12 2216 ax-ext 2735 ax-sep 5255 ax-nul 5266 ax-pow 5334 ax-pr 5398 ax-un 7783 ax-cnex 11295 ax-1cn 11297 ax-addcl 11299 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2102 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2839 df-nfc 2913 df-ne 2960 df-ral 3081 df-rex 3091 df-reu 3370 df-rab 3417 df-v 3456 df-sbc 3743 df-csb 3852 df-ss 3901 df-pss 4017 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-pw 4562 df-sn 4589 df-pr 4591 df-op 4841 df-uni 4873 df-iun 4958 df-br 5109 df-opab 5174 df-mpt 5193 df-tr 5219 df-id 5553 df-eprel 5558 df-po 5566 df-so 5567 df-fr 5611 df-we 5613 df-xp 5664 df-rel 5665 df-cnv 5666 df-co 5667 df-dm 5668 df-rn 5669 df-res 5670 df-ima 5671 df-pred 6330 df-ord 6391 df-on 6392 df-lim 6393 df-suc 6394 df-iota 6520 df-fun 6568 df-fn 6569 df-f 6570 df-f1 6571 df-fo 6572 df-f1o 6573 df-fv 6574 df-ov 7454 df-om 7912 df-2nd 8036 df-frecs 8337 df-wrecs 8368 df-recs 8417 df-rdg 8456 df-nn 12376 df-2 12445 df-slot 17404 df-ndx 17416 df-plusg 17486 |
| This theorem is used by: grpstr 17505 grpbase 17506 grpplusg 17507 |
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